I'm getting to this a little late (partially because I thought it was about personality
), but I have some thoughts. First off, there is an important distinction between actions that are instinctive (fight or flight, as mentioned in the first post), and actions that require a logical process. Instincts, such as FoF or the desire for food and water, are controlled mostly by the cerebellum, or brain stem. This is the most primitive part of the brain, our link to lesser animals. Reactions such as FoF are survival mechanisms processed without the need of the higher brain functions of the cerebrum. The example of walking down a dark alley has little to do with learned behavior, and everything to do with survival instincts. An interesting aspect of this is the discovery of neurotransmitters all along the gastrointestinal system. There are enough nerve cells in the digestive tract to act as a "second brain", hence the term "gut feeling". It is thought that the purpose for this is to decrease the time it takes impulses to travel from the brain to the lower extremities. A so-so article
here.
Secondly, there seems to be a grey area in the definitions of "behavior" and "actions". I would define behavior as a recurring pattern of actions. Let's continue with the example of a person who was brought up in a racist environment. The use of racial slurs, and basing decisions or evaluations on race are actions. The repetition of similar actions over a period of time determine a person's behavior. I'm not sure if there needs to be a distinction, since they are so intertwined. If anyone has any thoughts, I'd like to hear them.
As to ones responsibility for behavior, or genetics's influence thereof, the best I can speculate is 6 of 1, half dozen of the other. I'm pretty much in agreement with BKB's assertion that behavior is a combination of nature and nurture. The thing that I'm surprised no one mentioned are behaviors that are believed to be influenced by genetics, such as alcoholism. While there have been no concrete links between heredity and alcoholism, it has become a widely accepted theory. There are a couple of arguments either way. It would be logical to assume that a baby whose mother consumed alcohol during gestation or nursing would develop a physical dependence. Conversely, a child who grows up in an environment where the parent(s) regularly drink, the disposition towards alcoholism could be a learned behavior. As BKB also pointed out, behaviors, even physical and psychological dependencies, can be altered through conscious effort. This suggests that even if a person is genetically predisposed to certain behavior, ultimately they have a choice whether to continue said behavior, no matter how difficult a change may be.
I personally believe that a person's environment during their formative years is the biggest influence on behavior. Humans learn primarily by imitation. In the years before a child starts school, their brains are like sponges, soaking up everything they observe. The most interaction they have during this period is with the immediate family. By the time a child begins to interact with non family members on a regular basis, the building blocks for behavior and personality have been laid. While a person continues to develop throughout their life, the habits formed during childhood will endure. The learned behaviors that people would most need to be "held responsible" for (such as addiction, physical or sexual abuse) are unfortunately usually the most deep rooted. I believe a factor in this could be that these behaviors are often kept secret within a family. In a case like this, a person brought up in an abusive environment still makes a choice and is responsible for continuing such behavior, but in reality, it would probably take years of counseling to change completely.
Is it football season yet?